…To prepare for his trip, Trump has been meeting with briefers including Secretary of State Rex Tillerson, Secretary of Defense Jim Mattis, White House national security adviser H.R. McMaster, deputy national security adviser Dina Powell and senior adviser and son-in-law Jared Kushner.

Conversations with some officials who have briefed Trump and others who are aware of how he absorbs information portray a president with a short attention span.

He likes single-page memos and visual aids like maps, charts, graphs and photos.

National Security Council officials have strategically included Trump’s name in “as many paragraphs as we can because he keeps reading if he’s mentioned,” according to one source, who relayed conversations he had with NSC officials.

Trump likes to look at a map of the country involved when he learns about a topic.

It must be like training a not-very-bright dog: say his name and watch him cock his head.

I fail to see why this is a surprise to anyone. It’s like that Casablanca scene, you know, “I am shocked, shocked that Trump is an insufferable egomaniac, and is too illiterate to know what that means.”